/*
 * Copyright (C) 2008 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free 
 * Software Foundation, either version 3 of the License, or (at your option) 
 * any later version. 
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.peer.controller;

import java.util.List;

import org.ourgrid.common.interfaces.RemoteWorkerProviderClient;
import org.ourgrid.common.interfaces.management.WorkerManagement;
import org.ourgrid.common.interfaces.to.LocalWorkerState;
import org.ourgrid.common.statistics.control.WorkerControl;
import org.ourgrid.peer.controller.messages.ConsumerMessages;
import org.ourgrid.peer.dao.ConsumerDAO;
import org.ourgrid.peer.to.AllocableWorker;
import org.ourgrid.peer.to.LocalAllocableWorker;
import org.ourgrid.peer.to.RemoteConsumer;
import org.ourgrid.reqtrace.Req;

import br.edu.ufcg.lsd.commune.api.FailureNotification;
import br.edu.ufcg.lsd.commune.api.InvokeOnDeploy;
import br.edu.ufcg.lsd.commune.api.RecoveryNotification;
import br.edu.ufcg.lsd.commune.container.servicemanager.ServiceManager;
import br.edu.ufcg.lsd.commune.identification.DeploymentID;

/**
 * Implement Peer actions when a remote consumer recover or fail.
 */
public class RemoteWorkerProviderClientFailureController {

	private ServiceManager serviceManager;

	@InvokeOnDeploy
	public void init(ServiceManager serviceManager) {
		this.serviceManager = serviceManager;
	}

	@RecoveryNotification
	public void doNotifyRecovery(RemoteWorkerProviderClient monitorable, DeploymentID rwpcDID) {}

	/**
	 * Notifies that a remote consumer has failed
	 */
	@Req("REQ119")
	@FailureNotification
	public void doNotifyFailure(RemoteWorkerProviderClient monitorable, DeploymentID rwpcDID) {

		try {
			
			RemoteConsumer remoteConsumer = serviceManager.getDAO(
					ConsumerDAO.class).getRemoteConsumer(rwpcDID.getPublicKey());
			
			if (remoteConsumer == null) {
				serviceManager.getLog().debug(ConsumerMessages.getUnknownRemoteConsumerFailureMessage(rwpcDID));
				return;
			}
	
			serviceManager.getLog().info(ConsumerMessages.getRemoteConsumerFailureMessage(remoteConsumer.getDeploymentID()));
				
			List<AllocableWorker> allocableWorkers = remoteConsumer.getAllocableWorkers();
			
			for (AllocableWorker allocableWorker : allocableWorkers) {
				
				allocableWorker.deallocate();
				
				WorkerControl.getInstance().statusChanged(
						allocableWorker.getWorkerSpec().getServiceID(), 
						LocalWorkerState.IDLE, serviceManager);
				
				WorkerManagement worker = (WorkerManagement) allocableWorker.getWorkerManagement();
				boolean workerIsUp = serviceManager.getStubDeploymentID(worker) != null;
				
				if (workerIsUp) {
					worker.stopWorking();
					
				} else {
					
					WorkerNotificationController.workerFailure(serviceManager, allocableWorker.getWorkerSpec().getServiceID(), 
							((LocalAllocableWorker)allocableWorker).getLocalWorker());
				}
					
	
				if (allocableWorker.isDelivered()) {
					//Peer is already interested
	//				registerFailureInterested(workerMonitor, worker);
				}
			}
			
		} finally {
			serviceManager.release(monitorable);
		}

	}

}